OK, since you have managed to download and get the ADE to open the file, you might just find it easier to remove the DRM from the file so you can get it on your reader. Can't tell you hear on the forums exactly how to do it, but you can visit apprentice alf's page to find out how much easier it is to just strip the DRM instead of trying to get every stupid piece of software to work properly together. As always, your own ethics apply:
https://apprenticealf.wordpress.com/...epub-ineptpdf/